LHC signature of the minimal SUGRA model with a large soft scalar mass

Abstract

Thanks to the focus point phenomenon, it is quite natural for the minimal SUGRA model to have a large soft scalar mass (m₀>1 TeV). A distinctive feature of this model is an inverted hierarchy, where the lighter stop has a significantly smaller mass than the other squarks and sleptons. Consequently, the gluino is predicted to decay dominantly via stop exchange into a channel containing 2b and 2W along with the LSP. We exploit this feature to construct a robust signature for this model at the LHC in leptonic channels with 3-4 b tags and a large missing-E_T.